18970907 has 2 divisors, whose sum is σ = 18970908. Its totient is φ = 18970906.

The previous prime is 18970891. The next prime is 18970921. The reversal of 18970907 is 70907981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18970907 - 2⁴ = 18970891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18970927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485453 + 9485454.

It is an arithmetic number, because the mean of its divisors is an integer number (9485454).

Almost surely, 2^18970907 is an apocalyptic number.

18970907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18970907 is an equidigital number, since it uses as much as digits as its factorization.

18970907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 18970907 is about 4355.5604691015. The cubic root of 18970907 is about 266.7038991416.

The spelling of 18970907 in words is "eighteen million, nine hundred seventy thousand, nine hundred seven".